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brightness doesn't work

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http://askubuntu.com – I used Ubuntu 11.10 on Acer Aspire 4750 with Intel HD Graphics. When I made it up looks like Linux Mint 12, the graphics card was detected as Intel Sandy Bridge x86/MM2. But I still got problem with the brightness. It didn't work, as I had to try some tricks like editing the GRUB, but it still didn't work. Please help me (HowTos)

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Submitted by Songlist on 12/26/2011 – Made popular on 12/26/2011

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1. Can't set brightness via fn keys 2. Intel HD 3000 is not detected by system

Brigthness control did work when I tested with live usb.

I set acpi_backlight=vendor to grub, because without it there would be just blank screen.

Ubuntu 12.10 64 bit, fresh installation.

Help!

Can't adjust brightness 36 weeks 2 days ago

I have a Toshiba Satellite A105-4244 (Intel Chipset+Integrated Graphics) and I can't adjust the brightness. Neither the buttons nor the system settings/brightness and lock work.

Also I tried the grub suggestions acpi_backlight and it didn't solve anything.

I am new to Ubuntu, but so far I am loving it.

I was always unable to change my brightness since I installed Ubuntu, but I figured that installing the latest ATI driver for my graphics card would work.

I did, but I still can't change the brightness.

I have an Acer Aspire E1-531 and use Fedora 18. I can't adjust the display brightness. In the /sys/class/backlight/acpi_video0/actual_brightness seems to be changed, but the brightness don't change in reality.

I have a Toshiba Satellite C655D-S5209 with Ubuntu 12.04. I am unable to change the screen brightness.

I have just installed Ubuntu 12.10 on my netbook Packard Bell dot s with Intel GMA3600 graphics and everything works pretty well but the hotkeys on the keyboard to regulate the screen brightness, which don't work at all, either on Ubuntu or Xubuntu desktop.

I have been browsing and Ubuntu and my netbook doesn't seem to get along with this issue (http://ubuntuforums.org/showthread.p...dot+brightne

Just built a system w/ a ivy bridge CPU (Xeon E3-1245 v2) with Intel HD 4000 onboard graphics, board is an Asrock H77 ProM.

I had loaded Ubuntu server 12.04.1 onto it, but wanted to fool around w/ gnome 3. I installed gnome-shell, which didn't work, then gnome, which did, but only loads on fallback mode - the video is recognized as "VESA: sandy/ivy bridge graphics".

Just built a system w/ a ivy bridge CPU (Xeon E3-1245 v2) with Intel HD 4000 onboard graphics, board is an Asrock H77 ProM.

I had loaded Ubuntu server 12.04.1 onto it, but wanted to fool around w/ gnome 3.

I'm using Ubuntu 12.04 with up to date packages running on a Dell Inspiron N4030 laptop with an ATI Radeon HD 5400 graphics card. I'm using the new Catalyst 12.6 graphics driver (this version already fixed various bug with linux kernel 3.0)

The Problem is when I reduce the brightness and then restart it.